I bought a Samsung SGH-D600E from someone on eBay that has T-Mobile branding on it. Unfortunately the phone has a Network Lock on it, which means I can't use my simcard on it. As I'm in Australia and there is no T-Mobile over here, I really need to unlock the phone from the T-Mobile network!

I've sent an email to T-Mobile in the UK (where the phone is from) asking if they can provide me with the unlock code. Do you have any further suggestions as to what I might be able to do?